<template>
	<u-upload
		:fileList="innerValue" 
		@afterRead="afterRead" 
		@delete="deletePic" 
		multiple
		accept='image'
		width="100"
		height="100"
		:disabled="disabled"
		:deletable="!disabled"
		:maxCount="maxCount">
	</u-upload>
</template>

<script>
	import {
		TOKENNAME,
		HTTP_REQUEST_URL
	} from '@/config/app.js';
	import { useAppStore } from '@/stores/app'
	const appStore = useAppStore()
	export default {
		name: "upload",
		 options: {
			styleIsolation: 'shared'
		},
		emits: ['update:modelValue'],
		props: {
			modelValue: {
				type: Array,
				default: () => []
			},
			model: {
				type: String,
				default: ''
			},
			pid: {
				type: String,
				default: ''
			},
			maxCount: {
				type: Number,
				default: 5
			},
			disabled: {
				type: Boolean,
				default: false
			},
			maxSize: {
				type: Number,
				default: 1024*1024*10
			},
		},
		data(){
			return {
				innerValue:[]
			}
		},
		model: {
			prop: "value",
			event: "input"
		},
		watch: {
		    modelValue: {
				deep:true,
		        immediate: true,
		        handler(newVal, oldVal) {
		            this.innerValue = newVal||[];
		        },
		    },
		},
		methods: {
			// 删除图片
			deletePic(event) {
				this[`innerValue`].splice(event.index, 1)
				this.valueChange()
			},
			// 新增图片
			async afterRead(event) {
				// 当设置 multiple 为 true 时, file 为数组格式，否则为对象格式
				let lists = [].concat(event.file)
				let fileListLen = this[`innerValue`].length
				lists.map((item) => {
					this[`innerValue`].push({
						...item,
						status: 'uploading',
						message: '上传中'
					})
				})
				for (let i = 0; i < lists.length; i++) {
					const result = await this.uploadFilePromise(lists[i].url)
					let item = this[`innerValue`][fileListLen]
					this[`innerValue`].splice(fileListLen, 1, Object.assign(item, {
						status: 'success',
						message: '',
						url: result.url
					}))
					fileListLen++
				}
				
				this.valueChange()
				
			},
			uploadFilePromise(url) {
				return new Promise((resolve, reject) => {
					uni.uploadFile({
						url:`${HTTP_REQUEST_URL}/api/front/upload/image?model=${this.model}&pid=${this.pid}`,
						header: {
							// #ifdef MP
							"Content-Type": "multipart/form-data",
							// #endif
							[TOKENNAME]: appStore.token
						},
						filePath: url,
						name: 'multipart',
						success: (res) => {
							let data = res.data ? JSON.parse(res.data) : {};
							if (data.code == 200) {
								resolve(data.data)
							} else {
								reject(data)
								
								this.$util.Tips({
									title: data.message
								});
							}
							
						}
					});
				})
			},
			// 内容发生变化，进行处理
			valueChange() {
			    const value = this.innerValue;
			    this.$nextTick(() => {
			        this.$emit("update:modelValue", value);
			    });
			},
		}
	}
</script>

<style lang="scss" >
:deep(){
	.u-upload__button--disabled{
		display: none !important;
	}
}
</style>